Screen.



0. KELLY.

USCREEN.

APPLICATION FILED JUNE 6. I9I4.

1,145,316. y Patented my 6,1915.

' 2 SHEETS-s115211.

DUDE

0. KELLY.

SCREEN.

APPLICATION FILED IuIIE s. 15H4.r

Famed July 6,1915.

2 SHEETS-SHEET 2.

Attorneys ics.

. ORIN KELLY, OF-ATHENS, OHIO.

To all whom it may concern.'

Be it knownthat I, ORIN KELLY, a citizen of the United States, residingat Athens, in the county of Athens and State of Ohio, have invented anew and useful Screen, of which the following is a specification.

The device forming the subject matter of this applicationis adapted tobe employed for screening materials of any sort, but to avoidunnecessary repetition hereinafter, it will be presupposed that thestructure is employed in handling coal.

One object of the present invention is to provide a novel arrangement ofscreens or chutes, whereby the material may be graded according to itssize, it being possible to make up combinations comprising the varioussizes of graded material.

Another object of the invention is to provide a means whereby thematerial may be made to travel along a screen or chute which ishorizontally disposed, this operation beving brought `about by soproportioning a crank arm on a driving shaft and a-rod connectedtherewith, that the rod, and consequently the screen will travel atdifferent speeds at the ends of its stroke.

Another object of the invention is to provide a device of this type \inwhich the screens may be built in pairs and arranged to balance eachother, thus reducing the shock, and rendering unnecessary, costly andmassive foundations.

Another object of the invention is to provide Y a device of this type inwhich the screens may be given different leverages upon a rock arm,thereby permitting one screen to be heavier thanvthe other withoutcausing undue shock inthe operation of the structure.

It is within the scope of the invention to improve generally and toenhance the utility of devices of that type to which the presentinvention appertains.

'IVith the above and other objects in view which -will appear as thedescription proceeds, the invention `resides in the combina,- tion andarrangement of parts.and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed can be made within' thescope of what is claimed without departing from the-spirit of theinvention.

In the accompanying drawing z-Figure 1 is a side elevation showing oneform of the SCREEN. y

1,145,316. specification of Letters Patent. Patented July 6, 1915,Application inea June s, 1914.` senai N'o. 843,494. f

invention; Fig. 2 is a longitudinal section of the structure shown inFig. 1; Fig. 3 is a top plan of the struc-ture shown in Fig. 1;

Fig. 4 1s a cross section on the line 4--1 of- Fig. 2;.Figy5 is a crosssection on the line o-'o ot Fig. 2; Fig. 6 1s a top plan showing aportion of one of the driving means whereby the screens are actuated;Fig. 7 is a vertical longitudinal section showing the mechanism depictedin Fig. 6; Fig. 8 is a top plan showing a modified form of drivingmechanism; Fig. 9 is a side elevation of the structure shown in Fig. 8;Fig. 10 is a side elevation showing a. still further Inodication in thedriving mechanism; Fig. l1 is a side elevation showing a modified formof driving mechanism; Fig. 12 is a diagram referredto in connection withthe operation of the structure;'Fig. 13 is a fragmental top plan of onescreen; Fig. 14 is a section on the line 1%-14 of Fig. 13.

In carrying out the present invention and referring particularly toFigs. 1, 2and 4 there is provided an upper chute 1 and a lowerchute 2mounted to reciprocate in the direction of their lengths. These chutesmay be supported for reciprocating movement infamy, desired manner, butin the present instance and by way of illustration overhead supports 3are shown, hangers 4: being employed for suspending the upper chute 1from the supports 3,hangers"5 eX- ercising a like function with pspe'ctto the lower' chute 2. f

The bottom of the upper chute 1 is divided into a plurality of sections,the number, of sections being regulated by the number of grades intowhich it is desired to separate the material. In the present instance,the bottom of the upper chute l is depicted as comprising sections 6, 7and 8. Gpenin'gs 9 are formed in the section 6, the section 7 isprovided with openings 10 and there are openings 11 in the section 8.The openings 1l are the largest, the openings 9 are the smallest, andthe openings 10 in size lie intermediate the openings 9 and l1.

In fashioning the openings 9, 10 and 11,i

inclined tongues l2 are struck from the bottom of the upper chute 1, laswill be clearly understood from Figs.' l3and 14. Upon the back jerk ofthe upper chute 1,'the coal or other material which is too large to passthrough the respective openings, slides up the inclined tongues 12. Thisconstruction prevents the material from wedging in the openings, reducesto a minimum the breakage on the screen or coal, and by permitting afree passage of the chute, reduces the power necessary to drive thechute. i Y

Extended longitudinally of the lower chute 2 is a screen 14 ofcomparatively finel mesh, so that no coarser7 material can pass throughthe screen 14 than passes through the smallest openings 9 in the upperchute 1. 30 Below the screen 14, the chute 2 is provided withlongitudinally extended, troughshaped pocket 15. At intervals, thepocket is iutersected by transverse spouts 16 and 17, there beingopenings in the screen 14 15 above the spouts 16 and 17, these openingsbeing controlled by valves 18 and 19, actuated by any suitable meansindicated at 20. Extended across the lower chute 2 is' an imperforatebaffle plate 21. The baiiie plate 20 21 at one end extends above thespout 16,

and theV other end of the bale plate termi-A nates adjacent the first ofthe openings 10. A baflie plate 22 is similarly mounted in thelowerchute 2 and is located in a corresponda5 ing relation with respectto the spout 17 and the-openings 11.

yThe numeral23 indicates a supply bin of any desired' sort beneath whichreciprocates, upon a track 25, if desired, a feeder 24. Any' suitablemeans may be provided for reciprocating the feeder 24 but in the presentinstance the same is shown as operated 4through the medium lof a pitman26 pivoted to a crank arm 27 formed upon one end of a 3 5 shaft 28.`

' Presupposing that the device is to be emr ployed for handling coal,the coal, mixedl and of various sizes, is delivered-onto the,

section 6 of the upper chute 1, through the instrumentality of thefeeder 24. The slack or coal of smallest diameter, passes through theopenings 9 in the section 6 and drops into .the slack pocket l5 and ontothe bafie plate 21, from which the slack ultimately finds its Way intothe pocket 15. As the 'lower chute 2 is reciprocated, the slack coalmoves to the left and runs offl the left hand .end of the pocket 15.

The nut coal, which is the next largest size passes through the openings10 in thev section 7 of the upper chute and drops onto the screen 14 oronto the baie plate 22. Anyslack produced by the passage of the coalover the sections 6 and 7 of the upper chute passes through the screen14 into the pocket 15 and mingles with the slack which originally passedthrough the openings 9 in the section 6 and through the left hand end ofthe screen 14. The nut coal travels to the left along the screen 14, andultimately is received by the spout 16. The egg coal passes through theopenings 11 in the section 8 ofthe upper chute and moves to the leftalong the screen 14, the egg coal being @5 received-by the spout 17. Thelump coal which isthe largest size passes off the right hand end of theupper chute 1.-

Obviously, any desired mixture may be effected by manipulating thevalves 18. The

function of the baflie plate 21 is to prevent the slack coal passingthrough the section 6, from mingling with the nut coal which is movingto the left along the screen l4,.the fbaflle plate 22 exercising asimilar function with respect to the nut coal passing through 2 but aswill be set forth hereinafter the coal may be made to travel tothe rightalong the lower chute 2i No matter how the coal travels upon therespective 'chutes 1 e@ and 2, these chutes move in opposite directlonsand tend to' balance each other.j.r

I will now describe 'the various means whereby a reciprocating or'shaking'.'move-- ment may be imparted to the chutesland '2, $35

ln the drawings, base frames i.29 are shown, supporting for rotation ashaft 30. rlhe shaft 30 may be connected operatively with the shaft 28in any suitablemanner. In the present instance, the shaft 30 is shown asprovided with a pulley 31 about which is trained a belt 32 passed arounda pulley 33 on the shaft 28, although the showing of the drawings inthis regard'is illustrative merely. The shaft 30 is pro- 10 vided withcranks 34 whichl project in a common direction, and with each crank 34is assembled a short link 35, pivoted to a finger 3G projecting from arock arm 37 mounted on a frame supported shaft 38. H The rock arm 37 isprovided with a plurality of openings 39 in any .of which may be placedpivot elements 40 united with connccting rods 41 and 42, the connectingrods 41 leading to the upper chute 1 and the conl necting rods 42leading to the lower chute 2.

In Figs. Sand 9, a shaft 44 is'journaled 'l in suitable bearings 43 andis provided, in lieu of the crank 34, withthe cranks 45 disposed at anangleofdegrees with re- 15 spect to each other, the cran'ks45 beingconnected through the medium of short links 46 with a rockarmcomprisin-g'angularly disposed parts 47 mounted at their lower endsto swing upon a supporting shaft 48, 15

`the connecting rods which lead to the chutes or screens being denotedby the numeral 49. As shown in Fig; 10, the driveshaft is `depicted at50, the crank thereon at 51, the

short\\link being shown at 52. The rockarm l 53 is pivoted intermediateits ends as shown at 5e and the connecting rods which lead to the chutesor screens are shown at 55.

In Fig. 11, the drive shaft is shown at 56 and carries an 'eccentric 57surrounded by a strap 58 pivoted at 59 toa rock arm 60 supported forswinging movement yintermediate its ends as shown at 61, the connectingrods being shown at 62.

As a. general statement of operation, the device shown in Fig. 7 beingtaken as typical, it will be understood' that when the shaft 30 isrotated, the crank 34, through the medium of the link 'will swing therock arm 37 to-and fro, the connecting rods 41 and 42 causing the chutesor screens 1 and 2 to move in opposite directions. This generalstatement of o-peration is applicable to the other forms depicted, butsundry points of importance should be notedf at this place.

In Fig. 12, the operation of the device is shown diagrammatically andthis diagram will be applied to Fig. 10 by way of illustration, ysinceit is in Fig. 10 thatthe simplest form. of the invention is shown.

Suppose that the line AB representsithe crank 51, that the line ACrepresents the link 52, that the length of the crank '51 is six inches,and that the length of the link 52 is twelve inches. Then the length ofthe line BC is approximately ten inches. When the crank has movedthrough the first quadrant and has assumed the position BE, the linkwill assume the position ED, the length of the line BD being eighteeninches and the outer end of the link having moved through a distance ofeight inches, represented by the length of theline CD. As the crankmoves through the second quadrant and assumes the position BF, the outerend of the link will have moved through a dipstance of eight inches,represented by the line DC. As thecrank moves through the third quadrantand assumes the position BG, the outer end of the link will have movedthrough the distance CE, or approximately four inches. When the crankmoves through the fourth quadrant to the position AB, the outer end ofthe link will have moved through the distance EC or approximately at thetime the crank assumes the position l BE is greater than the momentum ofthe coal in the direction of the arrow Y at the time the crank assumesthe position BG.

Consequently, the coal will be advanced in the direction of thearrow X,even though the screens or chutes set level or assume a slight upwardinclination.

i If C represents the length of the crank and L represents the length ofthe link, it

lwill be seen that the operation above described takes place withmaximum efiiciency lengths of the crank and the link approach thefollowing proportion C L=1 1.

I The speed of advance ofthe coal along the chute or screen may beregulated by adjusting the relative lengths of the crank and the linkbut, in any event, the link should be relatively short, compared withthe crank.

The eccentric construction shown in Fig.l

`Figs. 8 and 9 is resorted to, the coal will move in the same directiononboth screens.

.The principle involved consists -in transforming the angular motion ofa crank or eccentric into a lineal motion through the instrumentality ofa rock arm, with theaddition of a relatively short `link when the crankisemployed instead ofthe eccentric.

In practice, the screens or chutes 1 and 2 are seldom of the sameweight, the lower screen or chute being usually lighter than the upperone. In order to secure a perfect counter balancing of the screens orchutes, so as to reduce the shocks on a supporting 'structure to aminimum, it is necessary that the momentum of the moving screens shouldbe as nearly equal as possible. If the lower screen is lighter than theupper screen and, if the momemtums of the screens are to beapproximately the same, it is obvious that the speed of reciprocation ofthe lower screen must be greater than the speed of reciprocation of theupper screen, since the.

momentumis the' product of the weight, and the speed. It is toaccomplish this result that the rock arm 37 is rovided with a pluralityof openings 39, 1t being possible to regulate and ad]ust the relativespeeds vwhen, as in the present case, the'relative of thetwo screens bymounting the pivot elements 40 res activelyA in the proper openings 39.Flirt er, the lower screen generally'should be run at' a higher shakingspeed than the upper screen, because the lower screen usually carriesthe finer grades of coal.

The invention includes, essentially, a rock arm as 37 or 60, thereciprocating screens or chutes 1 and 2, connections, indxcatedat 41 and42 or at 62 between the screens and the rock arm, a connection pivotedto the rock arm, the connectionbeing in the form CII of the strap 58 orthe link 35, a shaft such as 56 or 30, and an eccentric element carriedby the shaft, the eccentric element being of the form shown at 57 inFig. 11, or consisting of the crank 34, the eccentric element, whateverbe its form, being movably united with ,the connection, represented bysuch an element as 57 or 35.

Having thus described the invention, what is claimed is 1. In a deviceof the class described, vertically alined upper and lower chutes mountedfor individual longitudinal reciprocation, the upper chute comprisingsections having, respectively, openings of different sizes; a screenextended longitudinally of the lowerchute and lying beneath bothsections of the upper chute; an outlet spaced from the bottom of thelower chute,

and intersecting the screen intermediate the ends of the screen; and abaille in the lower chute and located above the screen, the bailleoverhangingthe outlet and terminating adjacent the outlet.

2. In a device of the class described, vertically alined upper and lowerchutes mounted for individual longitudinal reciprocation, the upperchute comprising sec tions having, respectively, openings of dii"- amsieferent sizes; a screen extended longitudinally of the lower chute andlying beneath both sections of the upper chute; an outlet spaced fromthe bottom of the lower chute and intersecting the screen intermediatethe ends of the screen; a baille in the lower chute and located abovethe screen, the baille overhanging the outlet and terminating adjacentthe outlet; and a valve operating in the lower chute and constituting ameans for bridging the outlet.

3. In a device of the 'class described, a support; a rock arm mounted toswing thereon; means for actuating the rock arm; superposed screens; andmeans for connecting the screens with the rock arm at adjusted pointsalong the rock arm, thereby to adjust the relative lineal speeds of rthescreens and to equalize the momentums of the screens when the same areof different Weights.

In testimony that I claim the foregoing as my own, l have hereto affixedmy signature in the presence of two witnesses.

C. W. Gnoss, l R. R. JOHNSON.

